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超声法制备金掺杂的纳米YBa2Cu3O7材料研究
Preparation of YBCO with nano-Au-doping by ultrasonic process
【摘要】 将高温固相法制得的YBCO研磨,于无水乙醇中进行超声分散获得纳米YBCO/乙醇溶胶,随后掺入纳米金溶胶,浓缩、干燥得金掺杂的YBCO材料.结果发现,纳米金掺杂的YBCO/乙醇溶胶中粒子形成纳米链;掺杂适量金提高了YBCO的晶化程度;掺金量为0.025wt%~0.500wt%时,金/YBCO材料的超导转变温度T_e为93.84~92.01 K,但掺杂1%的金时,样品超导性能消失.若能进一步控制好掺金量,金掺杂YBCO的T_e也会相应得到提高.
【Abstract】 YBCO bulk material by high temperature solid state reaction was milled and dispersed by ultrasonic process in alcohol solvent and nanoscale YBCO/alcohol sol was obtained.Then it was mixed with nano-Au sol and YBCO doped with Au materials were prepared after concentration and drying.The results show that the nanoparticles form nano chain in YBCO/ethanol sol doped with nano-Au.The degree of crystallization of YBCO is increased by doping with an appropriate amount of Au.Doped with 0.025%~0.500%by weight percentage of Au,the T_c of Au/YBCO materials are 93.84~92.01 K,but the superconductivity disappear with 1%of Au.The T_c YBCO doped with Au will be improved accordingly if the amount of Au can be further controlled.
- 【文献出处】 华中师范大学学报(自然科学版) ,Journal of Huazhong Normal University(Natural Sciences) , 编辑部邮箱 ,2011年01期
- 【分类号】TB383.1
- 【被引频次】1
- 【下载频次】23